CAcert – Free Digital Certificates

The Australian Non-profit organisation CAcert.org is challenging
providers of digital certificates that are expensive but essential for
online authentication and trust.

Digital certificates are required as a basis to encrypt and decrypt
data, to digitally sign documents and emails and to establish safe
secure transactions over the Internet (SSL). So far there has been no
alternative to commercial "Certificates Authorities (CA's)" who demand
exorbitant fees for simple text documents that furthermore have to be
renewed every year. CAcert allows privacy and security to all Internet
users, because trust should be free.

How to obtain a certificate
A digital certificate is based upon verification of the certificate
seeker's identity.
The proof of identity with CAcert is warranted by a simple procedure
called "Assurance". As part of the procedure at least two "Assurers"
convince themselves of the authenticity of a person before issuing a
personal certificate. Each personal certificate is being verified by
CAcert's Root Certificate once identity has been approved and can then
be used for the encryption of emails as well as for securing websites.
(https://)

As a CAcert Assurer, David Broz is authorised to verify your identity.
Are you a system administrator or are you running your own web server?
Do you just want a S/MIME certificate for your e-mail account?